Utsunomiya: A place to quarry out the history and geology of Oya stone

This article introduces sites related to Oya stone, a pumice stone quarried near Utsunomiya in Tochigi Prefecture.  The stone and the sites are fascinating; its an easy place to visit as a day trip from Tokyo, or as a stopover on the way to Nikko. (Archived article originally published by Japan Today.)

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